Thanks, just downloaded K10D and K20D pdf's - more for interest than any desire to fiddle around with my camera's.

I have a copy of the GX10 service manual if you'd like that? It's different to the K10D manual in that it's 217 pages but I suspect it's the user manual, parts list and service manual all in one document.

Quite a number of service manuals upto K-30/K-50 & K-5IIS here
And I have the K-30/K-50 versions (it's in quite a few parts, and "pretty hard going!) - so PM if you want it. K-3 II, K-3 and K-30 (now running the Hacked K-50 f/w, so it thinks it is one of those ), & some Sigma and Pentax lenses (and a lot of old 35mm gear!) - and now a K-70 from SRS